Dear Agrima,
I will not be able to tell you which course is better. But I will provide details about each of the above courses which can make it easier for you to make a choice:

1. Forensic Science

• Courses: Bsc , Msc, PHD
• Average Course Fees: Rs 30,000 to Rs 2.5 Lacs
• Admission Process: Entrance test or merit
• Average Starting Salary: INR 3 Lacs to INR 5 Lacs
• Future Careers: Forensic Expert, Forensic Scientist, Investigative officer, Cyber Forensic Expert etc.
• Top colleges in Kerala that offer Forensic Sciences:

1. College of Applied Science, Vadakkancherry
2. Sacred hearts College, Kochi
3. Kerala University of Health Sciences, Thrissur
4. Government Medical College, Thiruvananthapuram
5. MG University, Kottayam

2. Criminology

• Courses: BA. Bsc, MA, Msc, PHD
• Admission: merit based
• Average Fees: Rs 9,000 to Rs 1.2 Lacs
• Average Starting Salary: INR 3 Lacs to INR 4 Lacs
• Future Careers:  Investigator, Counselor, Medical Investigation Officer, Prison manager, Crime Researcher etc.
• Top colleges in Kerala offering Criminology:

1. MG University, Kottayam
2. St Pauls College, Ernakulam
3. School of Distance Education, Kottayam
4. Sanadhana Dharma College, Allapuzha
5. VTM NSS College, Thiruvananthapuram

All the best